diff options
| author | Javier Tia <floss@jetm.me> | 2026-04-25 14:49:59 -0500 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2026-06-09 10:15:21 +0000 |
| commit | b0dddf55af8147699182d002af1f7ff017dc5cfd (patch) | |
| tree | b7277c81fe1e9817df13e60a978458986194967c /drivers | |
| parent | 4a91a8c30bf409c06d56017e09f4fc58c5d044ce (diff) | |
wifi: mt76: mt7925: disable ASPM and runtime PM for MT7927
Disable PCIe ASPM unconditionally for MT7927. The CONNINFRA power
domain and WFDMA register access are unreliable with PCIe L1 active,
causing throughput to drop from 1+ Gbps to ~200 Mbps.
Disable runtime PM and deep sleep for MT7927. The combo chip shares
a CONNINFRA power domain between WiFi (PCIe) and BT (USB).
SET_OWN/CLR_OWN transitions on the LPCTL register crash the BT
firmware, requiring a full power cycle to recover. PM enablement will
be addressed in a follow-up once safe power state transitions are
determined.
Reviewed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Javier Tia <floss@jetm.me>
Link: https://patch.msgid.link/20260425195011.790265-10-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7925/init.c | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7925/pci.c | 6 |
2 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/init.c b/drivers/net/wireless/mediatek/mt76/mt7925/init.c index c0c5cb9aff75..a8c2ca7c0efc 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/init.c @@ -232,7 +232,8 @@ int mt7925_register_device(struct mt792x_dev *dev) dev->pm.idle_timeout = MT792x_PM_TIMEOUT; dev->pm.stats.last_wake_event = jiffies; dev->pm.stats.last_doze_event = jiffies; - if (!mt76_is_usb(&dev->mt76)) { + /* MT7927: runtime PM crashes BT firmware on the shared CONNINFRA domain */ + if (!mt76_is_usb(&dev->mt76) && !is_mt7927(&dev->mt76)) { dev->pm.enable_user = true; dev->pm.enable = true; dev->pm.ds_enable_user = true; diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c index 7e0d0e247fa3..3e2afa0dac74 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c @@ -350,7 +350,10 @@ static int mt7925_pci_probe(struct pci_dev *pdev, if (ret) goto err_free_pci_vec; - if (mt7925_disable_aspm) + is_mt7927_hw = (pdev->device == 0x6639 || pdev->device == 0x7927); + + /* MT7927: ASPM L1 causes unreliable WFDMA register access */ + if (mt7925_disable_aspm || is_mt7927_hw) mt76_pci_disable_aspm(pdev); ops = mt792x_get_mac80211_ops(&pdev->dev, &mt7925_ops, @@ -371,7 +374,6 @@ static int mt7925_pci_probe(struct pci_dev *pdev, dev = container_of(mdev, struct mt792x_dev, mt76); dev->fw_features = features; dev->hif_ops = &mt7925_pcie_ops; - is_mt7927_hw = (pdev->device == 0x6639 || pdev->device == 0x7927); dev->irq_map = is_mt7927_hw ? &mt7927_irq_map : &irq_map; mt76_mmio_init(&dev->mt76, pcim_iomap_table(pdev)[0]); tasklet_init(&mdev->irq_tasklet, mt792x_irq_tasklet, (unsigned long)dev); |